Revert "kernel: alarm: Do not call rtc_alarm_irq_enable in IRQ Disabled context"

This reverts commit e5c0c250a62748925460baef6a72811c0beeb45f.
Revert "kernel: alarm: add dedicated alarm type for poweroff alarm"

This reverts commit a9c5307582f6ef7680cb32e859a02079537b5eac.
Revert "kernel: alarm: fix the BUG that device automatically powers on"

This reverts commit 85d044b0e4759b1dcd38959224aeba45864847ba.
Revert "rtc: alarm: Set power-on alarm 120 sec before actual alarm time"

This reverts commit 489401149a0cbd8093d3490ebb49223d0c45a428.
Revert "rtc: alarm: Add power-on alarm feature"

This reverts commit a883b483d5ba2302becfea251118573dbff364fa.